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The new card is based on the same Barts GPU that powers the Radeon HD 6800 series. The card is aimed at NVIDIA's recently released GTX 550, which was initially priced at $150 but currently it can be found online for $130. So at least pricewise, the new Radeon HD 6790 is positioned against a GeForce GTX 460 768MB or a Radeon HD 6850 ( $160).

The 6790 is a cut-down from the 6850, losing 2 SIMD units and half of its ROPs but also features higher clockspeeds for both the core and the memory. The card has 800 SPs and 16 ROPs operating at 840MHz. It comes with 1GB GDDR5 memory clocked at 1050 MHz:

AMD Radeon HD 6870

AMD Radeon HD 6850

AMD Radeon HD 5830

AMD Radeon HD 6790

AMD Radeon HD 5770

Stream Processors

1120

960

1120

800

800

Texture Units

56

48

56

40

40

ROPs

32

32

16

16

16

Core Clock

900MHz

775MHz

800MHz

840MHz

850MHz

Memory Clock

1.05GHz (4.2GHz data rate) GDDR5

1GHz (4GHz data rate) GDDR5

1GHz (4GHz data rate) GDDR5

1050MHz (4.2GHz data rate) GDDR5

1.2GHz (4.8GHz data rate) GDDR5

Memory Bus Width

256-bit

256-bit

256-bit

256-bit

128-bit

VRAM

1GB

1GB

1GB

1GB

1GB

Transistor Count

1.7B

1.7B

2.15B

1.7B

956M

Manufacturing Process

TSMC 40nm

TSMC 40nm

TSMC 40nm

TSMC 40nm

TSMC 40nm

Price Point

~$200

~$160

$149

~$110

At 150W, the card requires 2 PCIe power sockets. It has also 1x dual link DVI out, 1x HDMI out and 1x Mini Displayport out.